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New picamera plugin

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This commit is contained in:
Fabio Manganiello 2019-08-16 11:11:22 +02:00
parent 65ef7ca027
commit b153d212e3
2 changed files with 433 additions and 48 deletions
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40
platypush/backend/camera/pi.py
View file

@ -1,6 +1,5 @@
import json
import socket
import time
from enum import Enum
from threading import Thread
@ -8,6 +7,7 @@ from threading import Thread
from platypush.backend import Backend
from platypush.context import get_backend
class CameraPiBackend(Backend):
"""
Backend to interact with a Raspberry Pi camera. It can start and stop
@ -29,12 +29,13 @@ class CameraPiBackend(Backend):
def __eq__(self, other):
return self.value == other
# noinspection PyUnresolvedReferences,PyPackageRequirements
def __init__(self, listen_port, x_resolution=640, y_resolution=480,
redis_queue='platypush/camera/pi',
start_recording_on_startup=True,
framerate=24, hflip=False, vflip=False,
sharpness=0, contrast=0, brightness=50,
video_stabilization=False, ISO=0, exposure_compensation=0,
video_stabilization=False, iso=0, exposure_compensation=0,
exposure_mode='auto', meter_mode='average', awb_mode='auto',
image_effect='none', color_effects=None, rotation=0,
crop=(0.0, 0.0, 1.0, 1.0), **kwargs):
@ -46,7 +47,6 @@ class CameraPiBackend(Backend):
:type listen_port: int
"""
import picamera
super().__init__(**kwargs)
self.listen_port = listen_port
@ -54,6 +54,8 @@ class CameraPiBackend(Backend):
self.server_socket.bind(('0.0.0.0', self.listen_port))
self.server_socket.listen(0)
import picamera
self.camera = picamera.PiCamera()
self.camera.resolution = (x_resolution, y_resolution)
self.camera.framerate = framerate
@ -63,7 +65,7 @@ class CameraPiBackend(Backend):
self.camera.contrast = contrast
self.camera.brightness = brightness
self.camera.video_stabilization = video_stabilization
self.camera.ISO = ISO
self.camera.ISO = iso
self.camera.exposure_compensation = exposure_compensation
self.camera.exposure_mode = exposure_mode
self.camera.meter_mode = meter_mode
@ -77,7 +79,6 @@ class CameraPiBackend(Backend):
self.redis_queue = redis_queue
self._recording_thread = None
def send_camera_action(self, action, **kwargs):
action = {
'action': action.value,
@ -97,17 +98,20 @@ class CameraPiBackend(Backend):
self.camera.capture(image_file)
self.logger.info('Captured camera snapshot to {}'.format(image_file))
# noinspection PyShadowingBuiltins
def start_recording(self, video_file=None, format='h264'):
"""
Start a recording.
:param video_file: Output video file. If specified, the video will be recorded to file, otherwise it will be served via TCP/IP on the listen_port. Use ``stop_recording`` to stop the recording.
:param video_file: Output video file. If specified, the video will be recorded to file, otherwise it will be
served via TCP/IP on the listen_port. Use ``stop_recording`` to stop the recording.
:type video_file: str
:param format: Video format (default: h264)
:type format: str
"""
# noinspection PyBroadException
def recording_thread():
if video_file:
self.camera.start_recording(video_file, format=format)
@ -116,8 +120,7 @@ class CameraPiBackend(Backend):
else:
while True:
connection = self.server_socket.accept()[0].makefile('wb')
self.logger.info('Accepted client connection on port {}'.
format(self.listen_port))
self.logger.info('Accepted client connection on port {}'.format(self.listen_port))
try:
self.camera.start_recording(connection, format=format)
@ -125,21 +128,18 @@ class CameraPiBackend(Backend):
self.camera.wait_recording(2)
except ConnectionError:
self.logger.info('Client closed connection')
try: self.stop_recording()
except: pass
try: connection.close()
except: pass
self.send_camera_action(self.CameraAction.START_RECORDING)
self._recording_thread = None
try:
self.camera.stop_recording()
self.stop_recording()
except:
pass
try:
connection.close()
except:
pass
self.send_camera_action(self.CameraAction.START_RECORDING)
if self._recording_thread:
self.logger.info('Recording already running')
return
@ -149,7 +149,6 @@ class CameraPiBackend(Backend):
name='PiCameraRecorder')
self._recording_thread.start()
def stop_recording(self):
""" Stops recording """
@ -187,4 +186,3 @@ class CameraPiBackend(Backend):
# vim:sw=4:ts=4:et:

441
platypush/plugins/camera/pi.py
View file

@ -2,48 +2,435 @@
.. moduleauthor:: Fabio Manganiello <blacklight86@gmail.com>
"""
from platypush.context import get_backend
from platypush.plugins import Plugin, action
import os
import socket
import threading
import time
from platypush.plugins import action
from platypush.plugins.camera import CameraPlugin
class CameraPiPlugin(Plugin):
class CameraPiPlugin(CameraPlugin):
"""
Plugin to control a Pi camera.
It acts as a wrapper around the :mod:`platypush.backend.camera.pi` backend
to programmatically control the status.
Requires:
* **picamera** (``pip install picamera``)
"""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
_default_resolution = (800, 600)
def __init__(self, resolution=(_default_resolution[0], _default_resolution[1]), framerate=24,
hflip=False, vflip=False, sharpness=0, contrast=0, brightness=50, video_stabilization=False, iso=0,
exposure_compensation=0, exposure_mode='auto', meter_mode='average', awb_mode='auto',
image_effect='none', color_effects=None, rotation=0, crop=(0.0, 0.0, 1.0, 1.0), **kwargs):
"""
See https://www.raspberrypi.org/documentation/usage/camera/python/README.md
for a detailed reference about the Pi camera options.
"""
super().__init__(**kwargs)
self.camera_args = {
'resolution': tuple(resolution),
'framerate': framerate,
'hflip': hflip,
'vflip': vflip,
'sharpness': sharpness,
'contrast': contrast,
'brightness': brightness,
'video_stabilization': video_stabilization,
'ISO': iso,
'exposure_compensation': exposure_compensation,
'exposure_mode': exposure_mode,
'meter_mode': meter_mode,
'awb_mode': awb_mode,
'image_effect': image_effect,
'color_effects': color_effects,
'rotation': rotation,
'crop': tuple(crop),
}
self._camera = None
self._time_lapse_thread = None
self._recording_thread = None
self._streaming_thread = None
self._time_lapse_stop_condition = threading.Condition()
self._recording_stop_condition = threading.Condition()
self._streaming_stop_condition = threading.Condition()
# noinspection PyUnresolvedReferences,PyPackageRequirements
def _get_camera(self, **opts):
if self._camera:
return self._camera
import picamera
self._camera = picamera.PiCamera()
for (attr, value) in self.camera_args:
setattr(self._camera, attr, value)
for (attr, value) in opts:
setattr(self._camera, attr, value)
return self._camera
@action
def start_recording(self):
"""
Start recording
"""
camera = get_backend('camera.pi')
camera.send_camera_action(camera.CameraAction.START_RECORDING)
@action
def stop_recording(self):
"""
Stop recording
"""
camera = get_backend('camera.pi')
camera.send_camera_action(camera.CameraAction.STOP_RECORDING)
@action
def take_picture(self, image_file):
def take_picture(self, image_file, preview=False, warmup_time=2, resize=None, **opts):
"""
Take a picture.
:param image_file: Path where the output image will be stored.
:type image_file: str
:param preview: Show a preview before taking the picture (default: False)
:type preview: bool
:param warmup_time: Time before taking the picture (default: 2 seconds)
:type warmup_time: float
:param resize: Set if you want to resize the picture to a new format
:type resize: list or tuple (with two elements)
:param opts: Extra options to pass to the camera (see
https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
:return: dict::
{"image_file": path_to_the_image}
"""
camera = get_backend('camera.pi')
camera.send_camera_action(camera.CameraAction.TAKE_PICTURE, image_file=image_file)
camera = self._get_camera(**opts)
image_file = os.path.abspath(os.path.expanduser(image_file))
if preview:
camera.start_preview()
if warmup_time:
time.sleep(warmup_time)
capture_opts = {}
if resize:
capture_opts['resize'] = tuple(resize)
camera.capture(image_file, **capture_opts)
return {'image_file': image_file}
@action
def capture_sequence(self, n_images, directory, name_format='image_%04d.jpg', preview=False, warmup_time=2,
resize=None, **opts):
"""
Capture a sequence of images
:param n_images: Number of images to capture
:type n_images: int
:param directory: Path where the images will be stored
:type directory: str
:param name_format: Format for the name of the stored images. Use %d or any other format string for representing
the image index (default: image_%04d.jpg)
:type name_format: str
:param preview: Show a preview before taking the picture (default: False)
:type preview: bool
:param warmup_time: Time before taking the picture (default: 2 seconds)
:type warmup_time: float
:param resize: Set if you want to resize the picture to a new format
:type resize: list or tuple (with two elements)
:param opts: Extra options to pass to the camera (see
https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
:return: dict::
{"image_files": [list of captured images]}
"""
camera = self._get_camera(**opts)
directory = os.path.abspath(os.path.expanduser(directory))
if preview:
camera.start_preview()
if warmup_time:
time.sleep(warmup_time)
camera.exposure_mode = 'off'
camera.shutter_speed = camera.exposure_speed
g = camera.awb_gains
camera.awb_mode = 'off'
camera.awb_gains = g
capture_opts = {}
if resize:
capture_opts['resize'] = tuple(resize)
images = [os.path.join(directory, name_format % str(i+1)) for i in range(0, n_images)]
camera.capture_sequence(images, **capture_opts)
return {'image_files': images}
@action
def start_time_lapse(self, directory, n_images=None, interval=0, warmup_time=2,
resize=None, **opts):
"""
Start a time lapse capture
:param directory: Path where the images will be stored
:type directory: str
:param n_images: Number of images to capture (default: None, capture until stop_time_lapse)
:type n_images: int
:param interval: Interval in seconds between two pictures (default: 0)
:type interval: float
:param warmup_time: Time before taking the picture (default: 2 seconds)
:type warmup_time: float
:param resize: Set if you want to resize the picture to a new format
:type resize: list or tuple (with two elements)
:param opts: Extra options to pass to the camera (see
https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
"""
if self._time_lapse_thread:
return None, 'A time lapse thread is already running'
camera = self._get_camera(**opts)
directory = os.path.abspath(os.path.expanduser(directory))
if warmup_time:
time.sleep(warmup_time)
capture_opts = {}
if resize:
capture_opts['resize'] = tuple(resize)
def capture_thread():
self.logger.info('Starting time lapse recording to directory {}'.format(directory))
i = 0
for filename in camera.capture_continuous(os.path.join(directory, 'image_{counter:04d}.jpg')):
i += 1
self.logger.debug('Captured {}'.format(filename))
if i >= n_images:
break
self._time_lapse_stop_condition.acquire()
should_stop = self._time_lapse_stop_condition.wait(timeout=interval)
self._time_lapse_stop_condition.release()
if should_stop:
break
self._time_lapse_thread = None
self.logger.info('Stopped time lapse recording')
self._time_lapse_thread = threading.Thread(target=capture_thread)
self._time_lapse_thread.start()
@action
def stop_time_lapse(self):
"""
Stop a time lapse sequence if it's running
"""
if not self._time_lapse_thread:
self.logger.info('No time lapse thread is running')
return
self._time_lapse_stop_condition.acquire()
self._time_lapse_stop_condition.notify_all()
self._time_lapse_stop_condition.release()
if self._time_lapse_thread:
self._time_lapse_thread.join()
# noinspection PyMethodOverriding
@action
def start_recording(self, video_file=None, directory=None, name_format='video_%04d.h264', duration=None,
split_duration=None, **opts):
"""
Start recording to a video file or to multiple video files
:param video_file: Path of the video file, if you want to keep the recording all in one file
:type video_file: str
:param directory: Path of the directory that will store the video files, if you want to split the recording
on multiple files. Note that you need to specify either video_file (to save the recording to one single
file) or directory (to split the recording on multiple files)
:type directory: str
:param name_format: If you're splitting the recording to multiple files, then you can specify the name format
for those files (default: 'video_%04d.h264')
on multiple files. Note that you need to specify either video_file (to save the recording to one single
file) or directory (to split the recording on multiple files)
:type name_format: str
:param duration: Video duration in seconds (default: None, record until stop_recording is called)
:type duration: float
:param split_duration: If you're splitting the recording to multiple files, then you should specify how long
each video should be in seconds
:type split_duration: float
:param opts: Extra options to pass to the camera (see
https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
"""
if self._recording_thread:
return None, 'A recording thread is already running'
multifile = not video_file
if multifile and not (directory and split_duration):
return None, 'No video_file specified for single file capture and no directory/split_duration specified for multifile split'
camera = self._get_camera(**opts)
video_file = os.path.abspath(os.path.expanduser(video_file))
def recording_thread():
if not multifile:
self.logger.info('Starting recording to video file {}'.format(video_file))
camera.start_recording(video_file)
self._recording_stop_condition.acquire()
self._recording_stop_condition.wait(timeout=duration)
self._recording_stop_condition.release()
self.logger.info('Video recorded to {}'.format(video_file))
else:
self.logger.info('Starting recording video files to directory {}'.format(directory))
i = 1
start_time = time.time()
end_time = None
if duration is not None:
end_time = time.time() + duration
camera.start_recording(name_format % i)
self._recording_stop_condition.acquire()
self._recording_stop_condition.wait(timeout=split_duration)
self._recording_stop_condition.release()
self.logger.info('Video file {} saved'.format(name_format % i))
while True:
i += 1
remaining_duration = None
if end_time:
remaining_duration = end_time - time.time()
split_duration = min(split_duration, remaining_duration)
if remaining_duration <= 0:
break
camera.split_recording(name_format % i)
self._recording_stop_condition.acquire()
should_stop = self._recording_stop_condition.wait(timeout=split_duration)
self._recording_stop_condition.release()
self.logger.info('Video file {} saved'.format(name_format % i))
if should_stop:
break
self.camera.stop_recording()
self._recording_thread = None
self._recording_thread = threading.Thread(target=recording_thread)
self._recording_thread.start()
@action
def stop_recording(self, **kwargs):
"""
Stop a camera recording
"""
if not self._recording_thread:
self.logger.info('No recording thread is running')
return
self._recording_stop_condition.acquire()
self._recording_stop_condition.notify_all()
self._recording_stop_condition.release()
if self._recording_thread:
self._recording_thread.join()
@action
def start_streaming(self, listen_port=5000, duration=None, format='h264' **opts):
"""
Start recording to a network stream
:param listen_port: TCP listen port (default: 5000)
:type listen_port: int
:param duration: Stream duration in seconds (default: None, record until stop_streaming is called)
:type duration: float
:param format: Video stream format (default: h264)
:type format: str
:param opts: Extra options to pass to the camera (see
https://www.raspberrypi.org/documentation/usage/camera/python/README.md)
"""
if self._streaming_thread:
return None, 'A streaming thread is already running'
camera = self._get_camera(**opts)
server_socket = socket.socket()
server_socket.bind(('0.0.0.0', listen_port))
server_socket.listen(0)
def streaming_thread():
self.logger.info('Starting streaming on listen port {}'.format(listen_port))
while True:
socket = server_socket.accept()[0].makefile('wb')
self.logger.info('Accepted client connection from {}'.format(socket.getpeername()))
try:
camera.start_recording(socket, format=format)
self._streaming_stop_condition.acquire()
self._streaming_stop_condition.wait(timeout=duration)
self._streaming_stop_condition.release()
break
except ConnectionError:
self.logger.info('Client closed connection')
try:
socket.close()
except:
pass
self.camera.stop_recording()
self._streaming_thread = None
self.logger.info('Stopped camera stream')
self._streaming_thread = threading.Thread(target=streaming_thread)
self._streaming_thread.start()
@action
def stop_streaming(self, **kwargs):
"""
Stop a camera streaming session
"""
if not self._streaming_thread:
self.logger.info('No recording thread is running')
return
self._streaming_stop_condition.acquire()
self._streaming_stop_condition.notify_all()
self._streaming_stop_condition.release()
if self._streaming_thread:
self._streaming_thread.join()
# vim:sw=4:ts=4:et: